[PATCH v2 0/4] printk: Fixes and hardening related to KERN_CONT

[Petr Mladek <pmladek@suse.com>]

The first patch fixes a messed output of continuous lines
when printing backtraces for all CPUs via NMI.

The other patches fix problems that I noticed when working
on the first patch.

I have incorporated the feedback and did much more testing.
Åll patches have changed so I did not add the taken Reviews
and Acks.

Changes against v1:

  + used const char in printk_nmi_flush_buffer()

  + print the final newline with KERN_CONT in
    printk_nmi_flush_buffer()

  + used printk_skip_level() instead of the hardcoded '2'
    in all patches.

  + define PRINTK_MAX_SINGLE_HEADER_LEN to avoid hardcoding
    the buffer size; it simplified the code in btrfs_printk()

  + ignore KERN_CONT in __snd_printk(); the lines were hard
    to read because of the added stuff like <filename:line>
    for each piece.
    

Petr Mladek (4):
  printk/NMI: Handle continuous lines and missing newline
  printk/kdb: Handle more message headers
  printk/btrfs: Handle more message headers
  printk/sound: Handle more message headers

 fs/btrfs/super.c          | 26 +++++++++-------
 include/linux/printk.h    | 10 ++++++
 kernel/debug/kdb/kdb_io.c |  2 +-
 kernel/printk/nmi.c       | 78 ++++++++++++++++++++++++++++++-----------------
 sound/core/misc.c         | 20 ++++++++----
 5 files changed, 90 insertions(+), 46 deletions(-)

-- 
1.8.5.6